-er a-a a-b a-c aaa aab aac aad aae aah aao aap aar aas ab- aba abb abc abd abe abh abo abp abr abs ac- aca acb acc acd ace ach aco acp acr acs ad- ada adb adc add ade adh ado adp adr ads aea aeb aec aed aee aeh aeo aep aer aes aha ahb ahc ahd ahe ahh aho ahp ahr ahs aoa aob aoc aod aoe aoh aoo aop aor aos ap- apa apb apc apd ape aph apo app apr aps ar- ara arb arc ard are arh aro arp arr ars as- asa asb asc asd ase ash aso asp asr ass b-p baa bab bac bad bae bah bao bap bar bas bba bbb bbc bbd bbe bbh bbo bbp bbr bbs bca bcb bcc bcd bce bch bco bcp bcr bcs bda bdb bdc bdd bde bdh bdo bdp bdr bds be- bea beb bec bed bee beh beo bep ber bes bha bhb bhc bhd bhe bhh bho bhp bhr bhs boa bob boc bod boe boh boo bop bor bos bpa bpb bpc bpd bpe bph bpo bpp bpr bps bra brb brd bre brh bro brp brr brs bsa bsb bsc bsd bse bsh bso bsp bsr bss c-- caa cab cac cad cae cah cao cap car cas cba cbb cbc cbd cbe cbh cbo cbp cbr cbs cca ccb ccc ccd cce cch cco ccp ccr ccs cda cdb cdc cdd cde cdh cdo cdp cdr cds ce- cea ceb cec ced cee ceh ceo cep cer ces ch- cha chb chc chd che chh cho chp chr chs co- coa cob coc cod coe coh coo cop cor cos cpa cpb cpc cpd cpe cph cpo cpp cpr cps cra crb crc crd cre crh cro crp crr crs csa csb csc csd cse csh cso csp csr css daa dab dac dad dae dah dao dap dar das dba dbb dbc dbd dbe dbh dbo dbp dbr dbs dca dcb dcc dcd dce dco dcp dcr dcs dda ddb ddc ddd dde ddh ddo ddp ddr dds de- dea deb dec ded dee deh deo dep der des dh- dha dhb dhc dhd dhe dhh dho dhp dhr dhs doa dob doc dod doe doh doo dop dor dos dpa dpb dpc dpd dpe dph dpo dpp dpr dps dra drb drc drd dre dro drp drr drs dsa dsb dsc dsd dse dsh dso dsp dsr dss eaa eab eac ead eae eah eao eap ear eas eba ebb ebc ebd ebe ebh ebo ebp ebr ebs ec- eca ecb ecc ecd ece ech eco ecr ecs ed- eda edb edc edd ede edh edo edp edr eds eea eeb eec eed eee eeo eep eer ees eha ehb ehc ehd ehe ehh eho ehp ehr ehs eo- eoa eob eoc eod eoe eoh eoo eop eor eos ep- epa epb epc epd epe eph epo epp epr eps era erb erc erd ere erh ero erp err ers es- esa esb esc esd ese esh eso esp esr ess haa hab hac had hae hah hao hap har has hba hbb hbc hbd hbe hbh hbo hbp hbr hbs hca hcb hcc hcd hce hch hco hcp hcr hcs hda hdb hdc hdd hde hdh hdo hdp hdr hds he- hea heb hec hed hee heh heo hep her hes hha hhb hhc hhd hhe hhh hho hhp hhr hhs hoa hob hoc hod hoe hoh hoo hop hor hos hpa hpb hpc hpd hpe hph hpo hpp hpr hps hr- hra hrb hrc hrd hre hrh hro hrp hrr hrs hsa hsb hsc hsd hse hsh hsp hsr hss oaa oab oac oad oae oah oao oap oar oas ob- oba obb obc obd obe obh obo obp obr obs oc- oca ocb occ ocd och oco ocp ocr ocs oda odb odc odd ode odh odo odp odr ods oea oeb oec oed oee oeh oeo oep oer oes oha ohc ohd ohe ohh oho ohp ohr ohs oo- ooa oob ooc ood ooh ooo oop oor oos op- opa opb opc opd ope oph opo opp opr ops or- ora orb orc ord ore orh oro orp orr ors os- osa osb osc osd ose osh oso osp osr oss p-p paa pab pac pad pae pah pao pap par pas pba pbb pbc pbd pbe pbo pbp pbr pbs pca pcb pcc pcd pce pch pco pcp pcr pcs pda pdb pdc pdd pde pdh pdo pdp pdr pds pea peb pec ped pee peh peo pep per pes pha phb phc phd phe pho php phr phs poa pob poc pod poe poh poo pop por pos ppa ppb ppc ppd ppe pph ppo ppp ppr pps pra prb prc prd pre prh pro prp prr prs ps- psa psb psc psd pse psh pso psp psr pss ra- raa rab rac rad rae rah rao rap rar ras rba rbb rbc rbd rbe rbh rbo rbp rbr rbs rca rcb rcc rcd rce rch rco rcp rcr rcs rda rdb rdc rdd rde rdh rdo rdp rdr rds re- rea reb rec red ree reh reo rep rer res rh- rha rhb rhc rhd rhe rhh rho rhp rhr rhs roa rob roc rod roe roh roo rop ror ros rpa rpb rpc rpd rpe rph rpo rpp rpr rps rra rrb rrc rrd rrh rrp rrr rrs rsa rsb rsc rsd rse rsh rso rsp rsr rss saa sab sac sad sae sah sao sap sar sas sba sbb sbc sbd sbe sbh sbo sbp sbr sbs sca scb scc scd sce sch sco scp scr scs sda sdb sdc sdd sde sdh sdo sdp sdr sds se- sea seb sec sed see seh seo sep ser ses sh- sha shb shc shd she shh sho shp shr shs soa sob soc sod soe soh soo sop sor sos spa spb spc spd spe